Fuel-injector.



S. WIGELIUS.

tFUEL INJBCTOR.

APPLlGATIoN FILED Amma. 1910` space h prvrrnn sfra'rns riifrmvr orrron.

SVEN l/VIGELIUS, OF STOCKHOLM, SWEDEN, ASSIGNOR T0 AKTIEBOLAGET WIGELIUE MOTORER, OF STOCKHOLM, SWEDEN;

FUEL-INJECTOR.

Specification of Letters Patent.

Patented Oct.` 6, 1914.

Application filed April 26 1910. Serial No. 557,783.

To nil i12/Tumiz mol/1l concern i Be it known that I, SVEN WIr-intros, a subject of the King of Sweden, residing at Kapteusgatan 17, Stockholm, Sweden, have invented new and useful ,improvements in Fuelflnjectors, of which the following is aV lined valve faces.

The object of the invention is chiefly used in connection with fuel injectors in which a regulating spindle is arranged with the air inlet channel.

The drawing shows one embodiment of the invention in longitudinal section.

The outer sleeve a is adapted to receive a threaded plug b secured into the same and c designates a tubular sleeve adapted to execute a slight up and down movement. Z is a regulating spindle provided with a regulating device c and forming with the inner walls of the plug and the sleeves c an air inlet channel the cross-sectional area oi' which is changingupon the operation of the spindle d The lower end of the sleeve c and the upper end of the plug b are shaped so as to form a valve g. By the positive operation of the sleeve c the valve g is alternately opened and closed, and the annular is alternately in communication with the channel f or closed against the same.

In order to obtain a perfect mixture of air and fuel, the mouth of the valve g is arranged in close proximity to a contraction of the channel f thereby greatly increasing the velocity of the air when passing this place in order to make the mixture a erfect and most intimate one. If the fue is introduced by a special mechanical device, two valves must be arranged one of which is arranged valve faces which form valves with two conveniently arranged regulating the flow of the fuel between a receptacle and a pump and the other the flow between a pump and air channel. Forthis purpose the sleeve c is provided with a second valve arranged between the annular space h and another annular space z' which latter is connected with 'a fuel container by means of the channel m. The sleeve c executes only an extremely limited movement in the direction of its longitudinal axis by which alternately the valves g and c are opened or closed. lf the sleeve is in its lower position, the valve k is open and the valve g closed. In this position the fuel, by virtue of the suction of the pump communicating Awith the channel i is pumped from fm, through 7c, and z into the pump chamber, if then the sleeve is moved into"its upper osition, the fuel is pressed by the pump t rough z' L and g intothejchannel f. The fuel, however, cannot be pressed back into the receptacle because the valve k is now closed.

It is clear, that the pump communicating with the space z' must execute a positively regulated movement relatively to the sleevec and spindle d. By the above described construction, the annular space k and also the pump connected with the space i will be alternately brought in communication upon the suction stroke of the pump with the fuel receptacle and upon its pressure stroke with the air inlet channel f.

It will be evident, that the injection of the Jfuel must commence and cease at the moment or nearly in the moment in which the current of air through the channel f is startedor ceases. This is effected by the arrangement of the spindle d and the sleeve c in such a manner that they begin their movement in each direction simultaneously. The sleeve c however, executes a consider4 able shorter movement than the spindle' an therefore it will lstop in each direction bef' fore the spindle stops. This 'combined movement is obtained in a very simple.man-

ner by positively regulating thernvment of the spindle d for instance by means of a cam disk, crank or the like, and-by the tional engagement between the'sleeve a and the spindle or a part connected therewith, by which the sleeve is ycarried along. The operation of the sleeves is limited by the upper and lower fixed-valve faces. he spindle d however can execute a movement independent from the sleeve d. If the spindle d is stationary the parts surrounding the same "must be movable. It is clear that the object of the present invention ma equally well be used With any re ulating evice for combustion engines in w ich the fuel is at times admitted into the air inlet channel in order to be mixed with air.

What I claim is:

In a fuel injector of the character described, the combination of an outer sleeve and a plug screwed into the same from below With a movable sleeve, an air inlet channel formed by the inner walls of said plug and the movable sleeve for supplying air,

said movable sleeve limiting the cross-scctional area of said inlet channel, valve faces upon opposite sides of said sleeve and valve faces upon said plug and upon lSaid outer sleeve for forming valves with the valve faces of said movable sleeve constituting a means for supplying fuel'.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

SVEN WIGE-LIUS.

Witnesses HEDMG MELINDER, HARRY ATBELIN. 

